refactor: let command default to be 'help'

Author: cokemine

lib/hexo.js

@@ -48,19 +48,11 @@ function entry(cwd = process.cwd(), args) {
 
     return hexo.init();
   }).then(() => {
-    let cmd = '';
+    let cmd = 'help';
 
     if (!args.h && !args.help) {
-      cmd = args._.shift();
-
-      if (cmd) {
-        const c = hexo.extend.console.get(cmd);
-        if (!c) cmd = 'help';
-      } else {
-        cmd = 'help';
-      }
-    } else {
-      cmd = 'help';
+      const c = args._.shift();
+      if (c && hexo.extend.console.get(c)) cmd = c;
     }
 
     watchSignal(hexo);